Internal-combustion engine.



AR. LUCAS. INTERNAL GOMBUSTION ENGINE. APPLICATION FILED MAYY 21, 1909.

'- UNiTnD smiles PATENT onnion.

RALPH LUCS,.OF BLACKI-IEIATII, :ENGILN1D,V ASSIGNOIRl TO VALVELESS LIIVII'JD, 0F

LONDON',l ENGLAND.

j INTERNAL-COMBUsTIoN ENGINE'.

Specification of terna1Gombustion Engines, of Which the' following isv a specification.

This invention' relates to .engines of the Well known type having -a closed crank chamber forming areservoir for compressed airand the object of the invention is to prevent ieakage of 'air l from the crank chamber through the bearings of the crankshaft.

The drawing is a section of an engine constructed aocordingto this invention'. lis the cylinder, 2 the combustion charnber and 3 the crank chamber,

4 is the piston .connected bythe rod 5 to a crank pin 6 fixed to disk 7 on the crank shaft S.

9 are counterbalance Weights'xed to the disks 7 and. 10 are filling 'pieces to diminish chamber.

the volume of the air space in the crank Theabove 1s Well known arrangement and requires no further description.

According to this invention airtight joints are made Where the crank shaft 8 enters the crank chamber 3 in the manner shown.

11 are bali bearings in Whichthe shaft runs.

chamber 3 being ground into piace and se- 12 is a bearing ring let into the 'Wallof the Letters Patent.

1909. ,Serial No. 497,538.

' cured by a doWel pinv 3X. The disk 7 fixed ring by a spring 13 thus -making a tight joint on one side, that onthe other lside being made by a cap 141 fixed in the Wall of the crankeehamber'by a bayonet joint.

15 is a pipe (connected to a hole-16 in the What I claimis l1. Inv an engine having a closed crank Chamber the combination ofthe chamber, a crankshaft entering, the chamberha disk rounding the crank shaftandfixed tothe Wall of the chamber and a spring tending the disk upon it against the bearing ring.

crank shaft entering the chamber, a disk fixed to the crank shaft, a bearing ring surrounding the crank shaft and fixed to the wal'l' of the chamber, a Aspring tending to disk upon it against vthe bearing ring, an opening into the crank chamber 'at the end of the crank shaftand acap closing the opening end forming an abutment for the spring. A

RALPH LUCAS.

Vitnesses V lFnnrmmoit I. "BRIGHT,

`to the crank shaft'is pressed against this fixed to the crank shaft, a bearing ring surv to force the crank shaft endwise and press .force the crank shaftendwise and'press the' Patented Nov. 3o, 1909.

ring 12)v through which lubricant is forced.

2. In an engine lhaving a closed crank y chamber the combination of the chamber, a 

